rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2689 jiffies s: 169201 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 31414 Comm: syz.0.6035 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:unwind_next_frame+0x2ab/0x1fd0 arch/x86/kernel/unwind_orc.c:449
Code: 8e 49 81 fd a4 11 2d 8e 0f 83 53 12 00 00 48 c7 c0 a4 11 2d 8e 49 29 c4 48 c7 c2 04 0e 9b 8e 49 c1 fc 02 4f 8d 24 64 4d 01 e4 <49> 01 d4 48 bd 00 00 00 00 00 fc ff df 0f 85 eb 00 00 00 e9 c4 00
RSP: 0018:ffffc900001e0108 EFLAGS: 00000046
RAX: ffffffff8e35e758 RBX: ffffc900001e0260 RCX: ffffffff8e35e760
RDX: ffffffff8ea84e98 RSI: ffffffff8e35e75c RDI: 0000000000000001
RBP: ffffffff8e35e760 R08: 0000000000000001 R09: ffffc900001e02b0
R10: dffffc0000000000 R11: fffff5200003c058 R12: 0000000000000000
R13: ffffffff8e35e75c R14: ffffffff81a4eba6 R15: ffffffff8e35e75c
FS:  00007ff8d1f9d6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000072e6b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __unwind_start+0x51a/0x650 arch/x86/kernel/unwind_orc.c:717
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 perf_callchain_kernel+0x29e/0x690 arch/x86/events/core.c:-1
 get_perf_callchain+0x236/0x490 kernel/events/callchain.c:204
 perf_callchain kernel/events/core.c:7522 [inline]
 perf_prepare_sample+0x399/0x2020 kernel/events/core.c:7555
 __perf_event_output kernel/events/core.c:7740 [inline]
 perf_event_output_forward+0x197/0x2f0 kernel/events/core.c:7760
 __perf_event_overflow+0x457/0x630 kernel/events/core.c:9506
 perf_swevent_overflow kernel/events/core.c:9589 [inline]
 perf_swevent_event+0x315/0x570 kernel/events/core.c:9640
 perf_tp_event+0x36b/0xc10 kernel/events/core.c:10074
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10042
 perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 12 6c 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900001e0c40 EFLAGS: 00000206
RAX: a8a7e409d5387b00 RBX: 1ffff9200003c190 RCX: a8a7e409d5387b00
RDX: dffffc0000000000 RSI: ffffffff8a8c18a0 RDI: ffffffff8adf6420
RBP: ffffc900001e0d30 R08: ffff8880b8f357cb R09: 1ffff110171e6af9
R10: dffffc0000000000 R11: ffffed10171e6afa R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3bb00 R15: 0000000000000002
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 rebalance_domains+0x86f/0x9d0 kernel/sched/fair.c:11051
 handle_softirqs+0x291/0x910 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> df 69 1d f7 65 8b 05 e0 0a c7 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900036f7a60 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a02 RCX: a8a7e409d5387b00
RDX: dffffc0000000000 RSI: ffffffff8a8c18a0 RDI: 0000000000000001
RBP: ffffc900036f7ae8 R08: ffff8880b8f357cb R09: 1ffff110171e6af9
R10: dffffc0000000000 R11: ffffed10171e6afa R12: dffffc0000000000
R13: ffff88805ca02fc0 R14: ffffffff96e77e98 R15: 1ffff920006def4c
 __debug_check_no_obj_freed lib/debugobjects.c:1054 [inline]
 debug_check_no_obj_freed+0x471/0x520 lib/debugobjects.c:1075
 slab_free_hook mm/slub.c:1704 [inline]
 slab_free_freelist_hook+0xd2/0x1b0 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 __kmem_cache_free+0xb6/0x200 mm/slub.c:3700
 tomoyo_path_number_perm+0x4fb/0x650 security/tomoyo/file.c:736
 security_file_ioctl+0x6c/0xa0 security/security.c:1572
 __do_sys_ioctl fs/ioctl.c:864 [inline]
 __se_sys_ioctl+0x48/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff8d119e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff8d1f9d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff8d1425fa0 RCX: 00007ff8d119e159
RDX: 0000000000000008 RSI: 0000000040042408 RDI: 0000000000000009
RBP: 00007ff8d1235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff8d1426038 R14: 00007ff8d1425fa0 R15: 00007ffc5bf60938
 </TASK>